i z i n g h eli-c al u t i l f l e x u r e t e ch n ol g yhelical’s product lines today include...
TRANSCRIPT
Innovative solutions for controlling mechanical movement
SINCE
1958
�
U
TILIZING HELI-CAL®
FLEXURE TECHNOLOGY
MANAGING MOTIONMANAGING MOTION
Helical Products Company, Inc.
H E L I C A L MANAGING MOTION
Often imitated, never duplicated.HELI-CAL® Flexure, flexible couplings are machined fromsingle piece, homogenous high-strength materials intohelical (curved beam) configurations which eliminate elastomeric elements like rubber bushings, spiders, rubber discs and pads. Helical couplings compensate forshaft misalignment and work at high speed, transmittinghigh torque at a constant velocity. There is zero backlash. No maintenance is needed.
Helical couplings provide dynamic stability and vibration-free, smooth bearing loads, even at misaligned positions.Helical couplings find applications in petrochemical plants,instrumentation, encoders, lead screws, ball screws, aircooling units, pumps, machine tools, CNC machines,duplicators, computer peripherals, wind power generators,anywhere there is a need for managing motion.
Six reasons why you should buy HELICALState-of-the-art, single piece, flexible (and torsionally stiff) couplings, utilizing the HELI-CAL Flexure.
No maintenance, no backlash, no lubrication, constant velocity, and smooth bearing loads.
Engineering collaborationTechnical consultation (free).
Quality productFifty years experience in perfecting manufacturing machinery and procedures used to produce HELI-CAL Flexure couplings that are of consistent high quality.
Service/on time shippingWe do what we say we’ll do e.g.- if we say, shipment in five working days we mean shipment in five working days.
Originator of HELI-CAL Flexure couplingsOver 10,000 successful coupling designs; over 30,000customers served.
Total product offeringsIn addition to a full line of standard couplings, the HELI-CAL Flexure can accommodate a variety of design requirements, such as special/customized end attachments like tangs, clamps, flanges or threaded ends.
CONTENTS
THE HELI-CAL FLEXURE
Now You Can Dream............................................... 3
The HELI-CAL Flexure Problem Solver .................. 4
Design Benefits of the Flexure ................................ 6
Operating Characteristics ..................................... 6
HELI-CAL FLEXURE FLEXIBLE COUPLINGS
HELI-CAL Flexure, Basic Product Summary ...........9
W Series, Aluminum and Stainless Steel .............10
DS Series, Aluminum ...........................................12
MC Series, Aluminum and Stainless Steel ............14
A Series, Aluminum ..............................................16
H Series, Stainless Steel........................................16
Special Bore Configurations .................................18
PF Series, Aluminum and Stainless Steel ..............20
IDEA STIMULATORS
X-Series Radial Slot Coupling .............................. 21
A New Angle on Universal Joints ......................... 22
Flexure Attachments that Make Sense ................. 23
What is a Machined Spring? ................................ 24
PLUS
Engineering Proposal Form ................................. 25
Literature Request Form....................................... 26
Philosophy .......................................................... 27
Representation ....................................... back cover
PRODUCTS COMPANY, INC.
Helical Products Company, Inc.901 West McCoy LaneP.O. Box 1069Santa Maria, CA 93456-1069 USAToll Free 877-353-9873Fax 805-928-236942
SINCE
1958
. . . as a flexible coupling
. . . as a U-joint
. . . as a machined spring
The inspiration for the HELI-CAL Flexure, the cylindrical helix ingredient for our basic Helicalproduct lines, came from the observation that onepiece, “flexured” flexible couplings offered maxi-mum versatility in terms of form, function and reliability.
Over time, the adaptability of the HELI-CAL Flexurehas helped to solve thousands of mechanical misalignment and motion control problems.
The unique, mechanical characteristics of the“Flexure” have enabled Helical Products Company,Inc. to develop a series of highly versatile, “flexured” products which can compensate forirregularities such as angular and skewed misalign-ment, parallel offset and axial motion. All of thiscan be accomplished while maintaining constantrotational velocity and smooth bearing loads.
Here’s the HELI-CAL Flexure . . .
Helical’s product lines today include miniature flexible couplings, u-joints, machined springs, andpower transmission flexible couplings.
The following pages present the many advantagesof HELI-CAL Flexure technology. The charts, dataand information are based on our “standard” seriesof one-piece, flexible couplings, which are usablefor a multitude of applications. As you becomeacquainted with the Flexure, you will see how versa-tile it can be, with for example, specials, machinedsprings, u-joints, and attachments. You will seealso how the HELI-CAL Flexure can have a positiveand marked impact on system performance, pro-duction efficiencies and overall cost savings.
If you do not see it here, just contact us. Our application engineers can design, develop andproduce a custom HELI-CAL Flexure to meet yourspecific requirements.
The HELI-CAL Flexure is a flexible helix (curved beam)machined from one piece of material into a specific configuration that incorporates special design requirements,performance features and/or characteristics.
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H E L I C A L The HELI-CAL® Flexure
Now You Can Dream . . .
H E L I C A L The HELI-CAL Flexure
Connecting Dreams with Design Solutions:The HELI-CAL Flexure Problem Solver
Freedom of design... for maximum versatility
The Helical hallmark is flexibility in form and func-tion. Designed from the start with your goals inmind and manufactured to exacting specifications,the HELI-CAL Flexure offers many problem-solving,performance-enhancing features.
Coil configuration
The individual performance capability of eachFlexure is determined by: coil width, inside diameter,number of coils, number of starts and material.Altering any one of these factors changes the performance characteristics of the “Flexure.”
For example, the HELI-CAL Flexures illustrated display identical outside diameters and lengths.The effects of their variable characteristics—suchas coil width, inside diameter, number of coils andstarts are explained in the adjacent pictures.
Coil widths and inside diameters
As the coil width or inside diameter are changedsuch aspects as torque...angular misalignment(bending moment)... parallel offset (radial load)...torsional stiffness... and compression spring rate,are altered.
When the inside diameter changes, so does the torquecapacity, torsional stiffness and axial spring rates, with-out restricting your choice of bore sizes.
Number of coils
As the number of coils is changed, all of the char-acteristics except the torque capacity are affected.
Number of coil starts
1) A single start design has one continuous coil.
2) A double start has a second coil starting 180 degrees from the first.
3) A triple start has three interwound coils, each spaced 120 degrees apart.
When a multi-start helix is used (double or triple),the effect is to increase the torque capacity and torsional stiffness while reducing misalignmentcapabilities (angular and parallel).
Material
The proper material used in the manufacture of anyHELI-CAL Flexure affects much more than justtorque capacity. Factors such as elasticity, fatigue,corrosion resistance, mass, magnetic permeability,operating temperature, availability and cost alsoplay important roles. High strength materials suchas 17-4PH CRES*, 15-5 PH, C300, BETA CTitanium and 7075-T6 Aluminum, are just a few ofthe common choices for meeting design and performance needs.
*CRES - Corrosion resistant steel
Inside Diameter
44
By varying the thickness of the coils, a Flexure can accommodate increasing amounts of torque and radialloads. The designer may specify torsional stiffness andcompression spring rates independent of other factors.
Coil Width
When the number of coils is changed the torque capabilityremains unaffected. All of the other characteristics change.
Multiple, (typically two) helical beams provide high tor-sional stiffness. Shown: single, double and triple start.
Bore variety
Helical Flexures may be engineered to include avariety of bore configurations. These variationsinclude round, threaded, single or double-D, spline,keyway, tapered or ... it’s your choice!
The HELI-CAL Flexure or flexible coil section of thecoupling can be custom designed and manufac-tured to your specifications. Whether your consid-erations include high torque, angular or parallelmisalignment, critical torsional stiffness, precisecompression spring rates, or special end connec-tions, chances are excellent that the HELI-CALFlexure will meet or exceed your particular designrequirements.
Attachments
In addition to being able to alter the characteristicsof the HELI-CAL Flexure, you may have yourattachment method integrated into the final product.
Typical attachment options might include:
• integral clamps• set screws• set screw at one end and an integral clamp
at the other• pins• slotted hubs• flanges• gears• removable caps• threaded bores with a wrench flat• or . . . whatever your design requires
Number of Coils
The HELI-CAL Flexure, Basic Product Summary,(page 9), summarizes our basic series of HELI-CAL Flexure couplings. By referring tovarious charts and coupling descriptions, youwill see how you can select a product thatmeets your design parameters. (See pages 10-21 for product specifics)
For more information or engineering assistance,please contact us.
Number of Coil Starts
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H E L I C A L The HELI-CAL Flexure
Design Benefits of the Flexure
More than a coupling
The HELI-CAL Flexure concept brings enormousdesign flexibility to your applications. Dependingon your needs, the Flexure can serve as a flexibleshaft coupling, universal joint, spring clutch,machined spring or your own unique specialized component.
Adaptability
The Flexure’s ability to accommodate various performance characteristics and Helical’s ability to integrate attachments directly enhances your freedom to design.
One-piece integrity
Not only does the Flexure integrate multiple functions and parts into a single compact unit— no moving parts, no maintenance and no back-lash—it can incorporate complex attachments.
State-of-the-art
High quality performance is achieved with magneticor non-magnetic corrosion-resistant stainless steel,as well as aluminum alloys. Flexures are also successfully manufactured using various materialssuch as Delrin™ and titanium.
Operating Characteristics
Misalignment compensation
The flexing capacity of the HELI-CAL Flexure can compensate for a variety of misalignments, includingparallel, angular and skewed (three-dimensional)misalignment. The Flexure solutions for these misalignment situations are shown in the adjacentphotographs.
Angular misalignment is the easiest form of misalignmentfor most couplings to accept, and thus one of the mostpractical applications of a flexible coupling. Allowing onlyenough space between coils to partially close the gapduring bending, the HELI-CAL Flexure can accept anangular misalignment of 20 degrees or more (and evenup to 90 degrees in special u-joint applications).
Optimized torque capacity
The basic requirement of a flexible coupling is totransmit torque loads without permanent distortionor damage and without imposing undue bending orradial loads upon the driver or driven components.Once the working torque rating of a HELI-CALFlexure coupling is established—based on misalignment and design criteria, material specifi-cations and service factors supplied during thedesign process—its operational life is virtually unlimited.
Configurable torsional stiffness
Every flexible shaft coupling has some torsionalflexibility. Torsional flexibility reflects the amount oftwist in a system; torsional stiffness the degree ofresistance against twist. The HELI-CAL Flexure canbe configured (with thicker coils, for example), toprovide the exact amount of torsional flexibilityrequired in an application.
Angular
46
Parallel misalignment is the most difficult form of mis-alignment for couplings to compensate for. It can alsobe the most damaging to shafts, bearings and motors.The HELI-CAL Flexure, through lateral displacement,transforms an application’s parallel misalignment prob-lems into angular displacement within the coupling. Thecenter coils of the HELI-CAL Flexure can become anintermediate shaft that can allow 10, 20 or 30 thou-sandths of an inch of parallel offset or more.
When shafts are not in the same plane (skewed), theHELI-CAL Flexure’s abilities to compensate are the sameas with either parallel or angular misalignment - but inthe third dimension. A Flexure designed with more coilsin a series can compensate for as much three-dimen-sional misalignment as your application requires.
Backlash: the HELI-CAL Flexure has zero backlash, because of its one-piece construction.
Angular misalignment, which can induce large fluctuations in rotational velocity in many coupling designs, is corrected by the HELI-CAL Flexure’s constant spring rate at all points of rotation.
Torsional variations, which can induce differences in hub-to-hub velocity when subjected to dynamic loading, are minimal in steady-state applications of the HELI-CAL Flexure.
Concentricity, when there is a lack of it— particularly in the case of couplings with backlash or where production variation is difficult to prevent—the HELI-CAL Flexure’s one-piece integrity minimizes sinusoidal variations.
Smooth bearing loads
Bearing loads are primarily generated by a cou-pling’s natural resistance to bending, and can bevery destructive forces to an apparatus and itsrotational components. The HELI-CAL Flexuremaintains a very constant radial and bending loadat all points of rotation, providing exceptionally uniform bearing loads.
Constant velocity
In a rotating system, constant velocity refers to therelative rotational speed of the input and outputshafts. In a constant velocity system the driven endof the coupling turns exactly the same rate as thedriver end. When operating under a uniform loadthe HELI-CAL Flexure design provides constantvelocity and alleviates:
Parallel Skewed
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Continued -
Adaptable Operating Speeds
The ability to adapt to high— and low—speedapplications is another inherent benefit of the HELI-CAL Flexure’s design. The Flexure transmitsmotion throughout its length and cross section in acontinuous helix from end to end. Torsional loading tends to make the HELI-CAL Flexure drawtoward its centerline, reducing the chance of whipping action normally associated with rotatingcomponents. Consequently, vibrations are kept to a minimum at all rotating points.
Axial Compensation
Axial movement is inherent in any rotating componentry, such as the rotor assembly in amotor. Through compression/extension, the HELI-CAL Flexure absorbs and compensates foraxial movement or end play. The curved-beamstructure of the HELI-CAL Flexure operates naturally in this axial compensation mode, and special designs can accommodate for even largedisplacement applications.
This sampling of “standard” HELI-CAL Flexure couplingsand specialized u-joints illustrates the variety of materi-als, coil configurations, bore diameters and attachmentmethods available to you.
No matter what its size or shape, the HELI-CAL Flexuredesign assures performance, reliability, quality andversatility, arguably unmatched in the coupling industry.
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H E L I C A L The HELI-CAL Flexure
48
HELI-CAL Flexure, Basic Product Summary
Refer to the summary chart on the next page to get an idea as to which couplingseries most closely fits your applicationneeds. You’ll then be able to find the appropriate coupling by following the seriescolumn down to the page number. If you do not see the coupling you need in thesepages, let us know. Our engineers can create special Flexure designs to meet yourparticular performance demands.
The charts on the following pages highlight features and technical data for each of the standard HELI-CAL coupling series.
Information covered by each chart includes:
Dimensional data Special notesPerformance data Ordering information
aluminum7075-T6
General purpose,light to medium duty.An economical, main-tenance free couplingwith metric dimen-sions, used in a vari-ety of applications.
Used forencoder/resolverapplications, lowtorque pump, leadscrew and variousother applications.
5° angular,.25mm paralleloffset, .25mmaxial motion
.59-20 Nm
0.118-0.787 inch3mm-20mm
Clamp or set screw
Up to 100° C
10,000 rpm
10
WSeries
stainless steel17-4PH
Stainless steel ver-sion of the “WA(C)”series, with highertorque capacity andtorsional stiffness.Increased fatigueresistance with met-ric dimensions andfasteners.
For situations requiring a heavyduty coupling, forpump, lead screws,and positioning sys-tems. Also for pro-cess equipment inindustrial situations.Anywhere a rugged,tough, long-lastingcoupling is needed.
5° angular,.25mm paralleloffset, .25mmaxial motion
1.2-39 Nm
0.118-0.787 inch3mm-20mm
Clamp or set screw
Up to 300° C
10,000 rpm
10
HELI-CAL Flexure, Basic Product Summary
DSSeries
aluminum7075-T6
Low inertia, high per-formance, aluminumcoupling, usingHelical double starttechnology.Torsionally stiffer andhigher torque capaci-ty than the “A”series. Lighter withlower inertia thanthe “H” series.
For high speedmotion control systems, where fastresponse time isimportant. E.g., lead and ballscrews, encoders/resolvers, and any-where high torsionalstiffness is required.
3° angular, .010 inch parallel offset, .008 inch
axial motion
12-234 lbin
0.188-0.750 inch4.78-19.05mm
Clamp
Up to 200° F
10,000 rpm
12
aluminum7075-T6
A general purposealuminum coupling,used where moreparallel misalignmentis required. Has alarge range of shaftsizes, with optionalkeyways.
Good forencoder/resolverapplications, moderate torquepump, lead screw,and various otherapplications.
5° angular, .030 inch parallel offset, .010 inch
axial motion
20-286 lbin
0.250-.875 inch6.35-22.23mm
Clamp or set screwKeyways optional
Up to 200° F
3,600 rpm
14
stainless steel17-4PH
Stainless steel version of “MCA(C)”series, with highertorque capacity andtorsional stiffness.Increased fatigueresistance.
Good for pump, con-veyor systems, andindustrial processingequipment, whereabsolute reliability isrequired. Anywherea rugged, tough,long-lasting couplingis needed.
5° angular, .030 inch parallel offset, .010 inch
axial motion
40-556 lbin
0.250-1.000 inch6.35-25.40mm
Clamp or set screwKeyways optional
Up to 600° F
3,600 rpm
14
Description
Typical applications
Misalignment compensation
Torque range
Standard bores (inch and/or metric bores available in all couplings)
Attachment
Operating temperatures
Speed (in wind-up direction)
For more information, see page
H E L I C A L HELI-CAL Flexure, Flexible Couplings
H E L I C A L Phone 805-928-3851 / Fax 805-928-2369 / www.Heli-Cal.com 9
MCSeries
Note: For PF Series see page 20.
ASeries
aluminum7075-T6
General purpose,light to medium duty.An economical, maintenance freecoupling, used in avariety of applica-tions.
Used for encoder/resolver applications,low torque pump,lead screw and various other applications.
5° angular, .010 inch parallel offset, .010 inch
axial motion
1.2-51 lbin
0.059-0.750 inch1.5-19.05mm
Clamp or set screw
Up to 200° F
10,000 rpm
16
HSeries
stainless steel17-4PH
Stainless steel ver-sion of “A” series,with higher torquecapacity and torsion-al stiffness.Increased fatigueresistance.
For situations requir-ing a heavy duty coupling such aspumps, lead screws,and positioning sys-tems; also for pro-cess equipment inindustrial situations.Anywhere a rugged,tough, long-lastingcoupling is needed.
5° angular, .010 inch parallel offset, .010 inch
axial motion
2.4-100 lbin
0.059-0.750 inch1.5-19.05mm
Clamp or set screw
Up to 600° F
10,000 rpm
16
WSeries
H E L I C A L W SERIES, Aluminum and Stainless Steel
Internal Configuration
Features
Attachment Methods
How To Order
●
●
Relief * Major and minor diameter shafts may enter flexure area during operation
* Dark areas indicate relief within the coupling interior
Integral Clamp / WAC & W7C
Set Screw / WA & W7 (two each end @ 120°)
Coupling part numbers consist of four sections. To determine thecorrect numbers/letters for each section of a specific coupling partnumber, please refer to the charts on the following pages.
Basic Model Number: Choose material and attachment method.
WAC = Aluminum, Integral Clamp WA = Aluminum, Set Screw W7C = Stainless Steel, Integral Clamp W7 = Stainless Steel, Set Screw
Outside Diameter Designator: This two-digit number represents the coupling outside diameter.Based on the Performance Data in the middle ofthe chart, select the Outside Diameter Designatorby moving left to the appropriate diameter.
Major Bore Designator: The larger of the twobores, its diameter is expressed in either millimeters (6mm) or in 32nds of an inch (-8 equals 1/4 inch). Please review your selectionto determine if both bores can be made in the sizecoupling you have selected in . It is importantthat the larger bore be stated first.
Minor Bore Designator: The smaller of the twobores is expressed the same as the Major BoreDesignator. Either bore can be mm or inch.Please specify mm when metric.
Example
1 Basic Model Number(W = metric, A = aluminum, C = integral clamp)
WAC 25 - 10mm - 8mm
** Refer to “Standard Bore Diameters” section of chart
W SERIES(aluminum shown)
2 Outside Diameter Designator
●3 Major Bore Designator **
●4 Minor Bore Designator **
●3
●4
●2
●1
●2
• Metric dimensions and fasteners• Metric and/or inch bores available• Available in 7075-T6 aluminum
alloy or 17-4 PH corrosion-resistant steel
• General purpose
If you are working in the metricworld, the W Series is for you. It combines the best features of theA Series and the H Series, with the
convenience of metric dimensionsand fasteners for your metric baseddesigns. The W Series can be usedin a wide range of applications fromdriving components with light torquerequirements, such as encoders andtachometers (aluminum), to leadscrews and pumps requiring greatertorque (stainless steel).
Unequal diameter shafts
Equal diameter shafts
LlengthD
outsidediameter
majorbore
diameter
minorborediameter
LlengthD
outsidediameter
majorbore
diameter
minorborediameter
410
Notes1. Shaft misalignments:
Angular 5 degreesParallel Offset .25 mm
(.50 mm T.I.R.)Axial Motion ± .25 mm
2. Dynamic torque ratings are momentary values. For non-reversing applications, divide by 2. Divide by 4 for reversing applications. Should the torque ratings be marginal for your application, contact us for analysis.
3. Material : 7075-T6 aluminum alloyFinish: clear anodize
or Material: 17-4 PH high-strength stainless steel.Finish: natural
4. Manufacturing dimensional tolerances unless otherwise specified are:
x ± .5 mmx.x ± .25 mm
5. Please refer to page 19 for other available bore dimensions.
6. Inertia is based on smallest standard bore diameter.
7. Keyways available on the 40 mm and 50 mm OD only.
Integral Clamp
Attachment
WAC
WAC
WAC
WAC
WAC
WAC
SetScrew
Attachment
WA
WA
WA
WA
WA
WA
Outside Diameter
Designator
15
20
25
30
40
50
DOutside
Diameter
15mm
20mm
25mm
30mm
40mm
50mm
LLength(mm)
22
20
28
20
30
24
38
30
50
50
54
54
Size (mm)
3.004.005.00
4.005.006.00
6.007.008.009.0010.00
9.0010.0011.0012.00
12.0013.0014.0015.0016.0014.0016.0018.0019.0020.00
BoreDesignator
3mm4mm5mm
4mm5mm6mm
6mm7mm8mm9mm10mm
9mm10mm11mm12mm
12mm13mm14mm15mm16mm14mm16mm18mm19mm20mm
MomentaryDynamicTorqueNote 2(Nm)
0.710.660.59
1.31.21.1
2.92.82.62.42.2
4.94.64.34.0
121111109.71918171615
Torsional Rate
(degree/Nm)
5.17.2
10.0
2.73.54.5
1.51.82.22.83.5
1.11.31.61.9
0.450.510.590.670.78
0.250.310.390.430.49
x 10-4
(kgcmsec2)Note 6
0.028
0.025
0.11
0.079
0.30
0.24
0.78
0.60
3.3
3.3
7.6
7.6
IntegralClamp
M2x.4
M3x.5
M3x.5
M4x.7
M5x.8
M6x1
Set Screw
M3x.5
M3x.5
M4x.7
M5x.8
M6x1
M6x1
(Nm)
0.5
1.0
2.0
1.0
2.0
2.1
4.7
4.7
9.5
7.7
16
7.7
(mm)
2.5
2.5
3.8
2.5
3.8
3.0
5.0
3.5
5.8
6.7
6.7
7.5
(+0.05mm /-0.00mm) Note 5
Attachment Screw&1 2 3 4
Attachment Screw&1 2 3 4
Integral Clamp
Attachment
W7C
W7C
W7C
W7C
W7C
W7C
SetScrew
Attachment
W7
W7
W7
W7
W7
W7
Outside Diameter
Designator
15
20
25
30
40
50
DOutside
Diameter
15mm
20mm
25mm
30mm
40mm
50mm
LLength(mm)
22
20
28
20
30
24
38
30
50
50
54
54
Size (mm)
3.004.005.00
4.005.006.00
6.007.008.009.0010.00
9.0010.0011.0012.00
12.0013.0014.0015.0016.0014.0016.0018.0019.0020.00
BoreDesignator
3mm4mm5mm
4mm5mm6mm
6mm7mm8mm9mm10mm
9mm10mm11mm12mm
12mm13mm14mm15mm16mm14mm16mm18mm19mm20mm
MomentaryDynamicTorqueNote 2(Nm)
1.41.31.2
2.62.52.3
5.75.55.14.74.3
9.58.98.37.7
23222120193735333130
Torsional Rate
(degree/Nm)
1.92.63.7
0.991.31.6
0.540.660.821.01.3
0.400.480.580.70
0.160.190.210.240.28
0.0920.110.140.160.18
x 10-4
(kgcmsec2)Note 6
0.078
0.070
0.32
0.22
0.84
0.66
2.2
1.7
9.2
9.2
21
21
IntegralClamp
M2x.4
M3x.5
M3x.5
M4x.7
M5x.8
M6x1
Set Screw
M3x.5
M3x.5
M4x.7
M5x.8
M6x1
M6x1
(Nm)
0.5
1.0
2.0
1.0
2.0
2.1
4.7
4.7
9.5
7.7
16
7.7
(mm)
2.5
2.5
3.8
2.5
3.8
3.0
5.0
3.5
5.8
6.7
6.7
7.5
(+0.05mm /-0.00mm) Note 5
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Basic ModelNumber
DimensionalInformation
Standard BoreDiameters
PerformanceData Inertia Screw
SizeSeating Torque
CenterLine
HELICAL W SERIES, Aluminum, Technical Data
HELICAL W SERIES, Stainless Steel, Technical Data
Basic ModelNumber
DimensionalInformation
Standard BoreDiameters
PerformanceData Inertia Screw
SizeSeating Torque
CenterLine
Conversions1mm = .039 inch1Nm = 8.85 lbin
1deg/Nm = .113 deg/lbin
H E L I C A L DS SERIES, Aluminum
Internal Configuration
Features
Attachment Methods
How To Order
●
●
• High torsional stiffness• Low radial loads• Parallel misalignment capability• Low inertia
The DS Series was designed fortoday’s high performance motion con-trol systems. This Series incorporatestwo helical beams (double start) ineach of two separate HELI-CALFlexures (double flexure), combininggreater end-to-end rotational accuracywith radial flexibility in one design.
Available only with integral clampattachments, the DS Series providesthe high torsional stiffness and lowinertia necessary for positioningdevices, servo motors and lead screws.
The DS Series also provides youwith substantial .010-inch parallel off-set capability, reducing the need forhigh-precision alignment duringassembly operations. It’s your ticket togreater system accuracy and reliability. Available only in 7075-T6aluminum.
Relief * Major and minor diameter shafts may enter flexure area during operation
* Dark areas indicate relief within the coupling interior
Integral Clamp / DSAC
Coupling part numbers consist of four sections. To determine thecorrect numbers/letters for each section of a specific coupling partnumber, please refer to the charts on the following pages.
Basic Model Number:
DSAC = Double start flexure, Aluminum and Integral Clamp
Outside Diameter Designator: This three-digitnumber represents the coupling outside diameter.Based on the Performance Data in the middle ofthe chart, select the Outside Diameter Designatorby moving left to the appropriate diameter.
Major Bore Designator: The larger of the twobores, its diameter is expressed in either 32nds ofan inch (-8 equals 1/4 inch) or in millimeters(6mm). Please review your selection to determineif both bores can be made in the size coupling youhave selected in . It is important that the largerbore be stated first.
Minor Bore Designator: The smaller of the twobores is expressed the same as the Major BoreDesignator. Either bore can be inch or mm.
Example
1 Basic Model Number(DS = double start, A = aluminum, C = integral clamp)
DSAC 125 - 16 - 12
** Refer to “Standard Bore Diameters” section of chart
DS SERIES
2 Outside Diameter Designator
●3 Major Bore Designator **
●4 Minor Bore Designator **
●3
●4
●2
●1
●2
Unequal diameter shafts
Equal diameter shafts
Llength
Doutside
diameter
majorbore
diameter
minorborediameter
412
1 2 &3 4 Attachment Screw
Integral Clamp
Attachment
DSAC
DSAC
DSAC
DSAC
DSAC
Outside Diameter
Designator
075
100
125
150
200
DOutside
Diameter (in.)
3/4
1
11/4
11/2
2
LLength
(in.)
1.25
1.50
1.75
2.25
2.50
Size in. & (mm)
0.188 (4.78)0.250 (6.35)
0.250 (6.35)0.313 (7.95)0.375 (9.53)
0.313 (7.95)0.375 (9.53)0.500(12.70)0.625(15.88)
0.375 (9.53)0.500(12.70)0.625(15.88)
0.500(12.70)0.625(15.88)0.750(19.05)
BoreDesignator
(1/32 in.)
68
81012
101216*20*
121620
162024
MomentaryDynamicTorqueNote 2(lbin)
1412
312925
61584735
13011594
234215190
Torsional Rate
(degree/lbin)
0.300.40
0.130.160.19
0.0620.0800.120.19
0.0300.0420.062
0.0160.0200.026
x 10-4
(lbinsec2)Note 7
0.091
0.35
0.98
2.7
9.5
IntegralClampNote 4
4-40
6-32
10-24
10-24
1/4 -20
(lbin)
10
19
50
50
120
(in.)
.12
.15
.22
.22
.26
(+.002in /-.000in) Note 6
Basic ModelNumber
DimensionalInformation
Standard BoreDiameters
PerformanceData Inertia Screw
SizeSeating Torque
CenterLine
Notes1. Shaft misalignments:
Angular 3 degreesParallel Offset .010 in. (.020 in. T.I.R.)Axial Motion ± .008 in.
2. Dynamic torque ratings are momentary values. For non-reversing applications, divide by 2. Divide by 4 for reversingapplications. Should the torque ratings
be marginal for your application,contact us for analysis.
3. Material : 7075-T6 aluminum alloyFinish: clear anodize
4. Metric fasteners available on request.
5. Manufacturing dimensional tolerances unless otherwise specified are:
fraction ± 1/64x.xx ± .01 in.
6. Please refer to page 18 for other available bore dimensions.
7. Inertia is based on smallest standard bore diameter.
8. This bore size requires an operating clearance diameter greater than coupling outside diameter.
* Refer to note 8
HELICAL DS SERIES, Aluminum, Technical Data
H E L I C A L Phone 805-928-3851 / Fax 805-928-2369 / www.Heli-Cal.com 13
H E L I C A L MC SERIES, Aluminum and Stainless Steel
Internal Configuration
Features
Attachment Methods
How To Order
●
●
Relief * Major and minor diameter shafts may enter flexure area during operation
* Dark areas indicate relief within the coupling interior
Integral Clamp / MCAC & MC7C
Set Screw / MCA & MC7 (two each end @ 120°)
Coupling part numbers consist of four sections. To determine thecorrect numbers/letters for each section of a specific coupling partnumber, please refer to the charts on the following pages.
Basic Model Number: Choose material and attachment method.
MCAC = Aluminum, Integral Clamp MCA = Aluminum, Set Screw MC7C = Stainless Steel, Integral Clamp MC7 = Stainless Steel, Set Screw
Outside Diameter Designator: This three-digitnumber represents the coupling outside diameter.Based on the Performance Data in the middle ofthe chart, select the Outside Diameter Designatorby moving left to the appropriate diameter.
Major Bore Designator: The larger of the twobores, its diameter is expressed in either 32nds ofan inch (-8 equals 1/4 inch) or in millimeters(6mm). Please review your selection to determineif both bores can be made in the size coupling youhave selected in . It is important that the largerbore be stated first.
Minor Bore Designator: The smaller of the twobores is expressed the same as the Major BoreDesignator. Either bore can be inch or mm.
Example
1 Basic Model Number(MC = motor coupling, A = aluminum, C = integral clamp)
MCAC 150 - 16 - 12
** Refer to “Standard Bore Diameters” section of chart
MC SERIES(aluminum shown)
2 Outside Diameter Designator
●3 Major Bore Designator **
●4 Minor Bore Designator **
●3
●4
●2
●1
●2
• Industrial motor shaft couplings• Large parallel misalignment
capacity• High torque capacity• Large shaft diameters• Keyways available
This versatile series of couplingsprovides you with a full range oftorque capacities and bore sizes, allwith 1/32-inch parallel misalignmentcapability. These couplings attach toshafts with your choice of integral
clamps or set screws. Combine this with optional keyways and theMC Series is tailor-made for yourapplication.
From medium-duty (aluminum) to heavy-duty (stainless steel), thisseries provides solutions for a widerange of applications. From pumpsand lead screws to conveyors,chances are an MC Series couplingwill fit your needs. Available in7075-T6 aluminum alloy or 17-4 PHcorrosion resistant steel (CRES).
Unequal diameter shafts
Equal diameter shafts
LlengthD
outsidediameter
majorbore
diameter
minorborediameter
LlengthD
outsidediameter
majorbore
diameter
minorborediameter
414
Notes1. Shaft misalignments:
Angular 5 degreesParallel Offset .030 in. (.060 in. T.I.R.)Axial Motion ± .010 in.
2. Dynamic torque ratings are momentary values. For non-reversing applications, divide by 2. Divide by 4 for reversingapplications. Should the torque ratings be marginal for your application,contact us for analysis.
3. Material : 7075-T6 aluminum alloyFinish: clear anodize
or Material: 17-4 PH high-strength stainless steel.Finish: natural
4. Metric fasteners available on request.
5. Manufacturing dimensional tolerances unless otherwise specified are:
fraction ± 1/64x.xx ± .01 in.
6. Please refer to page 19 for other available bore dimensions.
7. Inertia is based on smallest standard bore diameter.
8. With integral clamp attachments only, this bore size requires an operating clearance diameter greater than coupling outside diameter.
9. Inch and metric keyways available.
Attachment Screw&1 2 3 4
Integral Clamp
Attachment
MC7C
MC7C
MC7C
MC7C
MC7C
SetScrew
Attachment
MC7
MC7
MC7
MC7
MC7
Outside Diameter
Designator
100
125
150
200
225
DOutside
Diameter (in.)
1
11/4
11/2
2
21/4
LLength
(in.)
1.75
2.37
2.62
3.00
3.50
Size in. & (mm)
0.250 (6.35)0.313 (7.95)0.375 (9.53)
0.313 (7.95)0.375 (9.53)0.500 (12.70)0.625 (15.88)
0.375 (9.53)0.500 (12.70)0.625 (15.88)
0.500 (12.70)0.625 (15.88)0.750 (19.05)
0.625 (15.88)0.750 (19.05)0.875 (22.23)1.000 (25.40)
BoreDesignator
(1/32 in.)
81012
101216*20*
121620
162024
20242832
MomentaryDynamicTorqueNote 2(lbin)
514640
98917454
194170140
347319282
556510454392
Torsional Rate
(degree/lbin)
0.0980.1400.190
0.0480.0620.1100.210
0.0240.0370.060
0.0130.0180.025
0.0090.0120.0160.023
x 10-4
(lbinsec2)Note 7
1.1
3.8
8.7
31.9
60.0
IntegralClampNote 4
6-32
10-32
10-32
1/4 -28
1/4 -28
Set ScrewNote 4
10-32
1/4 -28
1/4 -28
1/4 -28
1/4 -28
(lbin)
19
25
56
65
56
65
135
65
135
65
(in.)
.15
.15
.22
.20
.22
.20
.26
.30
.26
.40
(+.002in /-.000in) Note 6
Basic ModelNumber
DimensionalInformation
Standard BoreDiameters
PerformanceData Inertia Screw
SizeSeating Torque
CenterLine
* Refer to note 8
Integral Clamp
Attachment
MCAC
MCAC
MCAC
MCAC
MCAC
SetScrew
Attachment
MCA
MCA
MCA
MCA
MCA
Outside Diameter
Designator
100
125
150
200
225
DOutside
Diameter (in.)
1
11/4
11/2
2
21/4
LLength
(in.)
1.75
2.37
2.62
3.00
3.50
Size in. & (mm)
0.250 (6.35)0.313 (7.95)0.375 (9.53)
0.313 (7.95)0.375 (9.53)0.500 (12.70)
0.375 (9.53)0.500 (12.70)
0.500 (12.70)0.625 (15.88)
0.625 (15.88)0.750 (19.05)0.875 (22.23)
BoreDesignator
(1/32 in.)
81012
101216*
1216
1620
202428
MomentaryDynamicTorqueNote 2(lbin)
262320
514738
10088
178164
286262233
Torsional Rate
(degree/lbin)
0.2700.3700.530
0.1300.1700.300
0.0650.100
0.0350.049
0.0240.0320.044
x 10-4
(lbinsec2)Note 7
0.41
1.3
3.1
11.4
21.5
IntegralClampNote 4
6-32
10-24
10-24
1/4 -20
1/4 -20
Set ScrewNote 4
10-24
1/4 -20
1/4 -20
1/4 -20
1/4 -20
(lbin)
19
25
50
65
50
65
120
65
120
65
(in.)
.15
.15
.22
.20
.22
.20
.26
.30
.26
.40
(+.002in /-.000in) Note 6
Basic ModelNumber
DimensionalInformation
Standard BoreDiameters
PerformanceData Inertia Screw
SizeSeating Torque
CenterLine
Attachment Screw
* Refer to note 8
&1 2 3 4
HELICAL MC SERIES, Aluminum, Technical Data
HELICAL MC SERIES, Stainless Steel, Technical Data
H E L I C A L Phone 805-928-3851 / Fax 805-928-2369 / www.Heli-Cal.com 15
How To Order
Shared Features of the A & H Series
Features, H Series
H E L I C A L A SERIES, Aluminum and H SERIES, Stainless Steel
Internal Configuration
Attachment Methods
●
●
Relief * Major and minor diameter shafts may enter flexure area during operation
Integral Clamp / ACR & HCR
Set Screw / AR & HR (two each end @ 120°)
Coupling part numbers consist of four sections. To determine thecorrect numbers/letters for each section of a specific coupling partnumber, please refer to the charts on the following pages.
Basic Model Number: Choose material and attachment method.
ACR = Aluminum, Integral Clamp AR = Aluminum, Set Screw HCR = Stainless Steel, Integral Clamp HR = Stainless Steel, Set Screw
Outside Diameter Designator: This three-digitnumber represents the coupling outside diameter.Based on the Performance Data in the middle ofthe chart, select the Outside Diameter Designatorby moving left to the appropriate diameter.
Major Bore Designator: The larger of the twobores, its diameter is expressed in either 32nds ofan inch (-8 equals 1/4 inch) or in millimeters(6mm). Please review your selection to determineif both bores can be made in the size coupling youhave selected in . It is important that the largerbore be stated first.
Minor Bore Designator: The smaller of the twobores is expressed the same as the Major BoreDesignator. Either bore can be inch or mm.
Example
1 Basic Model Number(A = aluminum, C = integral clamp, R = internal relief)(H = Stainless Steel, C = integral clamp, R = internal relief)
ACR 112 - 16 - 12
** Refer to “Standard Bore Diameters” section of chart
H SERIES
2 Outside Diameter Designator
●3 Major Bore Designator **
●4 Minor Bore Designator **
●3
●4
●2
●1
●2
A SERIES
(HCR)
No maintenanceShaft sizes from 3/32 to 3/4
An array of options, in a variety of diameter sizes, allows you to tailor the A or H Series to your specific applications. A and H Series options include set screw or integral clamp attachments and inch or metric bores.
Features, A Series
• High torque capacity• High fatigue resistance• Corrosion resistant steel (CRES)
The H Series coupling is idealwhen high strength, excellent fatigueresistance and high torsional stiff-ness is called for in your application.The H Series’ premium performancecapability is designed for applicationsrequiring a heavy-duty coupling, suchas drive systems, small pumps andgear boxes.
• Light to medium duty• Non-magnetic• Economical• No maintenance
The A Series coupling meets performance demands over a widerange of applications, including drivesystems for encoders, instrumentation,lead screws, small pumps, feed rollersand anywhere a light to medium duty,torsionally flexible coupling is required.
Unequal diameter shafts
Equal diameter shafts* Dark areas indicate relief
within the coupling interior
LlengthD
outsidediameter
majorbore
diameter
minorborediameter
LlengthD
outsidediameter
majorbore
diameter
minorborediameter
416
Attachment Screw&1 2 3 4
Notes1. Shaft misalignments:
Angular 5 degreesParallel Offset .010 in.
(.020 in. T.I.R.)Axial Motion ± .010 in.
2. Dynamic torque ratings are momentary values. For non-reversing applications, divide by 2. Divide by 4 for reversing applications. Should the torque ratings be marginal for your application, contact us for analysis.
3. Material : 7075-T6 aluminum alloy used for ACR / AR series.Finish: clear anodize
or Material: 17-4 PH high-strength stainless steel used for HCR / HR series.Finish: natural
4. Metric fasteners available on request.
5. Manufacturing dimensional tolerances unless otherwise specified are:
fraction ± 1/64x.xx ± .01 in.
6. Please refer to page 18 for other available bore dimensions.
7. Inertia is based on smallest standard bore diameter.
8. With integral clamp attachments only, this bore size requires an operating clearance diameter greater than coupling outside diameter.
Attachment Screw&1 2 3 4
Integral Clamp
Attachment
HCR
HCR
HCR
HCR
HCR
HCR
HCR
SetScrew
Attachment
HR
HR
HR
HR
HR
HR
HR
Outside Diameter
Designator
050
062
075
087
100
112
125
DOutside
Diameter (in.)
1/2
5/8
3/4
7/8
1
11/8
11/4
LLength
(in.)
0.75
0.50
0.80
0.62
0.90
0.75
1.06
0.87
1.25
1.00
1.50
1.12
1.62
1.25
Size in. & (mm)
0.094 (2.39)0.125 (3.18)
0.125 (3.18)0.157 (3.99)0.188 (4.78)
0.125 (3.18)0.157 (3.99)0.188 (4.78)0.250 (6.35)
0.188 (4.78)0.250 (6.35)0.313 (7.95)
0.250 (6.35)0.313 (7.95)0.375 (9.53)
0.250 (6.35)0.313 (7.95)0.375 (9.53)0.500 (12.70)
0.375 (9.53) 0.500 (12.70)0.625 (15.88)
BoreDesignator
(1/32 in.)
34
456
4568
68
10*
81012
8101216
1216*20*
MomentaryDynamicTorqueNote 2(lbin)
7.57.0
141312
21202017
373430
524742
83787155
947757
Torsional Rate
(degree/lbin)
0.360.48
0.190.240.31
0.110.130.160.25
0.0720.100.15
0.0620.0860.12
0.0350.0450.0610.12
0.0410.0710.13
x 10-5
(lbinsec2)Note 7
0.31
0.19
0.78
0.58
1.8
1.5
4.1
3.3
8.3
6.5
15.6
11.3
26.0
19.4
IntegralClampNote 4
1-72
2-56
4-40
6-32
6-32
6-32
10-32
Set ScrewNote 4
2-56
4-40
6-32
6-32
10-32
10-32
1/4-28
(lbin)
4.0
1.3
4.5
4.3
10
8.0
19
8.0
19
25
19
25
56
65
(in.)
.09
.06
.10
.07
.12
.09
.15
.10
.15
.15
.15
.14
.22
.16
(+.002in /-.000in) Note 6
Basic ModelNumber
DimensionalInformation
Standard BoreDiameters
PerformanceData Inertia
ScrewSize
Seating Torque
CenterLine
* Refer to note 8
Integral Clamp
Attachment
ACR
ACR
ACR
ACR
ACR
ACR
ACR
SetScrew
Attachment
AR
AR
AR
AR
AR
AR
AR
Outside Diameter
Designator
050
062
075
087
100
112
125
DOutside
Diameter (in.)
1/2
5/8
3/4
7/8
1
11/8
11/4
LLength
(in.)
0.75
0.50
0.80
0.62
0.90
0.75
1.06
0.87
1.25
1.00
1.50
1.12
1.62
1.25
Size in. & (mm)
0.094 (2.39)0.125 (3.18)
0.125 (3.18)0.157 (3.99)0.188 (4.78)
0.125 (3.18)0.157 (3.99)0.188 (4.78)0.250 (6.35)
0.188 (4.78)0.250 (6.35)0.313 (7.95)
0.250 (6.35)0.313 (7.95)0.375 (9.53)
0.250 (6.35)0.313 (7.95)0.375 (9.53)0.500 (12.70)
0.375 (9.53) 0.500 (12.70)0.625 (15.88)
BoreDesignator
(1/32 in.)
34
456
4568
68
10*
81012
8101216
1216*20*
MomentaryDynamicTorqueNote 2(lbin)
3.73.5
7.16.76.2
10109.88.6
191715
272422
43403728
483929
Torsional Rate
(degree/lbin)
0.981.3
0.510.660.86
0.290.360.440.68
0.200.280.41
0.170.240.33
0.0940.120.170.32
0.110.200.37
x 10-5
(lbinsec2)Note 7
0.11
0.069
0.28
0.21
0.66
0.54
1.5
1.2
3.0
2.3
5.6
4.1
9.3
6.9
IntegralClampNote 4
1-72
2-56
4-40
6-32
6-32
6-32
10-24
Set ScrewNote 4
2-56
4-40
6-32
6-32
10-24
10-24
1/4-20
(lbin)
4.0
1.3
4.5
4.3
10
8.0
19
8.0
19
25
19
25
50
65
(in.)
.09
.06
.10
.07
.12
.09
.15
.10
.15
.15
.15
.14
.22
.16
(+.002in /-.000in) Note 6
Basic ModelNumber
DimensionalInformation
Standard BoreDiameters
PerformanceData Inertia
ScrewSize
Seating Torque
CenterLine
* Refer to note 8
HELICAL A SERIES Aluminum, Technical Data
HELICAL H SERIES Stainless Steel, Technical Data
H E L I C A L Phone 805-928-3851 / Fax 805-928-2369 / www.Heli-Cal.com 17
Notes1 Bore sizes are placed into the part number
with leading dashes after the basic model number. Standard bore dimensions are noted in 32nds of an inch, such as 8/32 or 3/32 in. The respective dash numbers would be –8 and –3. Any bore dimensions that are not an integer number of 32nds should be converted to their millimeter equivalent with “mm” after the numerical designation, e.g., .315 in = 8 mm.
2 When specifying part numbers, metric bore diameters are specified without trailing zeros after the decimal point , e.g. .315 in.
= 8.00 mm, but the bore designation is – 8mm. This is only for simplicity in ordering and does not affect the tolerances of the actual bore dimensions. Bore tolerances are specified on the Engineering Proposal Form at the end of the catalog.
3 Manufacturing dimensional tolerances unless otherwise specified are:
4 A complete line of specialty OEM and end-user products is available; please refer to the Engineering Proposal Form and/or contact our Engineering Department.
5 A chart showing our standard line of instrumentation couplings with precision bore tolerancing is available upon request.
6 All parts are available with metric or inch fasteners to be compatible with the fastener system used in your designs.
7 Bore diameters less than minimum listed may be possible for one bore only. Contact our Engineering Department.
fract
± 1/64
x
±.5mm
x.xx
±.010
x.x
±.25mm
x.xxx
±.005
x.xx
±.15mm
angle
±2º
angle
±2º
Integral Clamp
Attachment
DSAC
DSAC
DSAC
DSAC
DSAC
Outside Diameter
Designator
075
100
125
150
200
DOutside
Diameter (in.)
3/4
1
11/4
11/2
2
Minimum Size in. & (mm)
0.188 (4.78)
0.250 (6.35)
0.313 (7.95)
0.375 (9.53)
0.500 (12.70)
Maximum Size in. & (mm)
0.250 (6.35)
0.394 (10.00)
0.630 (16.00)
0.630 (16.00)
0.750 (19.05)
Maximum Size in. & (mm)
0.390 (9.90)
0.563 (14.31)
0.668 (16.98)
0.908 (23.07)
1.280 (32.50)
Bore Depth in. & (mm)
0.25 (6.35)
0.38 (9.65)
0.44 (11.18)
0.57 (14.48)
0.68 (17.27)
With Relief Restricted Bore Configurations*
Basic Model Number Outside Diameter Special Bore Diameters
W7C/WAC
W7C/WAC
W7C/WAC
W7C/WAC
W7C/WAC
W7C/WAC
W7/WA
W7/WA
W7/WA
W7/WA
W7/WA
W7/WA
Outside Diameter
Designator
15
20
25
30
40
50
DOutside
Diameter
15mm
20mm
25mm
30mm
40mm
50mm
Minimum Size mm
3.003.004.004.006.006.009.009.0012.0012.0014.0014.00
Maximum Size mm
5.005.006.356.3510.0010.0012.7012.7016.0016.0020.0020.00
Maximum Size mm
7.309.009.8114.0014.5617.0017.3020.0024.8025.4032.1138.10
Bore Depth mm
6.004.858.554.858.555.8511.006.8515.5017.0015.5017.00
With Relief Restricted Bore Configurations*Integral Clamp
Attachment
SetScrew
Attachment
Unequal diameter shafts Equal diameter shafts
418
H E L I C A L Special Bore Configurations
HELICAL W SERIES / pages 10 – 11
Basic Model Number Outside Diameter Special Bore Diameters
HELICAL DS SERIES / pages 12 – 13
*Restricted Bore Configuration
Integral Clamp Attachment
ACR/HCR
ACR/HCR
ACR/HCR
ACR/HCR
ACR/HCR
ACR/HCR
ACR/HCR
Set ScrewAttachment
AR/HR
AR/HR
AR/HR
AR/HR
AR/HR
AR/HR
AR/HR
Outside Diameter
Designator
050
062
075
087
100
112
125
DOutside
Diameter (in.)
1/2
5/8
3/4
7/8
1
11/8
11/4
Minimum Size in. & (mm)
0.090 (2.29)
0.090 (2.29)
0.090 (2.29)
0.090 (2.29)
0.118 (3.00)
0.118 (3.00)
0.138 (3.50)
0.118 (3.00)
0.156 (3.96)
0.156 (3.96)
0.188 (4.78)
0.188 (4.78)
0.313 (7.94)
0.313 (7.94)
Maximum Size in. & (mm)
0.125 (3.18)
0.125 (3.18)
0.197 (5.00)
0.197 (5.00)
0.250 (6.35)
0.250 (6.35)
0.315 (8.00)
0.315 (8.00)
0.375 (9.53)
0.375 (9.53)
0.512 (13.00)
0.512 (13.00)
0.625 (15.88)
0.625 (15.88)
Maximum Size in. & (mm)
0.236 (6.00)
0.315 (8.00)
0.325 (8.26)
0.375 (9.53)
0.390 (9.90)
0.512 (13.00)
0.444 (11.27)
0.630 (16.00)
0.563 (14.31)
0.630 (16.00)
0.684 (17.38)
0.630 (16.00)
0.669 (17.00)
0.750 (19.05)
Bore Depth in. & (mm)
0.19 (4.83)
0.12 (3.05)
0.20 (5.08)
0.14 (3.56)
0.25 (6.35)
0.18 (4.57)
0.31 (7.87)
0.20 (5.08)
0.31 (7.87)
0.26 (6.60)
0.45 (11.43)
0.27 (6.86)
0.51 (12.95)
0.32 (8.13)
With Relief Restricted Bore Configurations*
Basic Model Number Outside Diameter Special Bore Diameters
MC7C
MC7C
MC7C
MC7C
MC7C
MCAC
MCAC
MCAC
MCAC
MCAC
MC7
MC7
MC7
MC7
MC7
MCA
MCA
MCA
MCA
MCA
Outside Diameter
Designator
100
125
150
200
225
DOutside
Diameter (in.)
1
11/4
11/2
2
21/4
Minimum Size in. & (mm)
0.156 (3.96)0.156 (3.96)0.156 (3.96)0.156 (3.96)0.313 (7.95)0.313 (7.95)0.313 (7.95)0.313 (7.95)0.313 (7.95)0.313 (7.95)0.313 (7.95)0.313 (7.95)0.375 (9.53)0.375 (9.53)0.375 (9.53)0.375 (9.53)0.375 (9.53)0.375 (9.53)0.375 (9.53)0.375 (9.53)
Maximum Size in. & (mm)
0.394 (10.00)0.394 (10.00)0.394 (10.00)0.394 (10.00)0.630 (16.00)0.512 (13.00)0.630 (16.00)0.512 (13.00)0.630 (16.00)0.512 (13.00)0.630 (16.00)0.512 (13.00)0.750 (19.05)0.630 (16.00)0.750 (19.05)0.630 (16.00)1.000 (25.40)0.875 (22.23)1.000 (25.40)0.875 (22.23)
Maximum Size in. & (mm)
0.563 (14.30)0.563 (14.30)0.630 (16.00)0.630 (16.00)0.668 (16.98)0.668 (16.98)0.750 (19.05)0.750 (19.05)0.908 (23.07)0.908 (23.07)1.000 (25.40)1.000 (25.40)1.280 (32.50)1.280 (32.50)1.500 (38.10)1.500 (38.10)1.525 (38.73)1.525 (38.73)1.750 (44.45)1.750 (44.45)
With Relief Restricted Bore Configurations*
Basic Model Number Outside Diameter Special Bore Diameters
Integral Clamp
Attachment
SetScrew
Attachment
H E L I C A L Phone 805-928-3851 / Fax 805-928-2369 / www.Heli-Cal.com 19
HELICAL MC SERIES / pages 14 – 15
HELICAL A and H SERIES / pages 16 - 17
Bore Depth in. & (mm)
0.37 (9.40)
0.51 (12.95)
0.66 (16.76)
0.75 (19.05)
0.86 (21.84)
Angular: 4 degrees Axial: +/-.020in (.50mm) Max. RPM: 6,000Conversion from Horsepower to Torque: (HP x 63,000) RPM = Trq (lbin) or (HP x 7,119) RPM = Trq (Nm)
M6.0 Hex Head Cap Screw 5 places (M5.0 Hex Head Cap Screw 4 places on PFA/PFS 200)
*Seating of screws: For correct installation, progressively tighten screws to specified torque in sequence shown above.
.. ..
H E L I C A L PF SERIES PowerFlex, Aluminum and Stainless Steel
Features
• No maintenance, lubrication or backlash.• Available in aluminum and stainless steel
with 2, 2.5 and 3 inch OD. Standard with quick change tapered bushings.
• Offered in inch or millimeter bore sizes up to 1 3/4 inch diameter.
• Torque capacities up to 1800 lbin. • High torsional stiffness. • Compensates for angular, parallel and
axial misalignment.• More torque for less money.
Note 1 Shaft sizes less than or equal to the Max w/RELIEF can penetrate to the center of the coupling. See drawing.Note 2 Shaft sizes greater than the Max w/RELIEF up to the Max w/STEP BORE can only penetrate to the B dimension. See drawing.Note 3 Dynamic torque ratings are momentary values. For non-reversing applications, divide by 2.
Divide by 4 for reversing applications. Should the torque ratings be marginal for your application, contact us for analysis.
420
HELICAL PF Series PowerFlex, Technical Data
STANDARD BORE DIAMETER+.002 / - .000 in (+0.05 / - .00 mm)
PERFORMANCE DATA PARTNUMBER
DIMENSIONAL INFORMATION ATTACHMENT SCREW WEIGHT
Maxw/STEP BORE
see note 2in
(mm)
1.000
(25.00)
1.375
(35.00)
1.750
(44.00)
Maxw/RELIEFsee note 1
in(mm)
.875
(22.00)
1.125
(28.00)
1.375
(35.00)
Min
in(mm)
.500
(12.00)
.500
(12.00)
.625
(16.00)
OD
in(mm)
2.00
(50.8)
2.50
(63.5)
3.00
(76.2)
L
in(mm)
4.00
(101.6)
4.75
(120.7)
5.50
(139.7)
L1
in(mm)
3.12
(79.2)
3.70
(94.0)
4.47
(113.5)
B
in(mm)
.82
(20.8)
1.00
(25.4)
1.13
(28.7)
Size
M5
M6
M6
Qty
4
5
5
PFA200
PFS200
PFA250
PFS250
PFA300
PFS300
Lightly grey shaded boxes indicate stainless steel (CRES)
MomentaryDynamic Torque
see note 3lbin
(Nm)
250(28)
530(60)
480(55)
1,025(115)
840(95)
1,800(205)
TorsionalRate
deg/lbin(deg/Nm)
.027(.24)
.0096(.085)
.014(.12)
.0050(.045)
.0080(.071)
.0030(.026)
ParallelOffset
in(mm)
.025(.65)
.025(.65)
.030(.75)
.030(.75)
.035(.85)
.035(.85)
SeatingTorque
lbin(Nm)
55(6.2)
65(7.3)
90(10)
110(12)
90(10)
110(12)
lb(kg)
0.87(.39)
2.31(1.05)
1.68(.76)
4.46(2.02)
2.70(1.22)
7.31(3.32)
The PF Series incorporates the convenience of interchangeable bushings, providing for quick and easy changes in boresizes, while using the same HELI-CAL flexible coupling center section. By designing the tapered bushings to hold moretorque than the maximum torque capacity of the coupling, the need for keyways has been eliminated.
H E L I C A L Phone 805-928-3851 / Fax 805-928-2369 / www.Heli-Cal.com 21
The X-series couplings offer a cost effective balance between couplings that are too stiff radially and those not stiffenough torsionally for servo-type applications. It features high torsional stiffness, low radial loads, one-piece integrity,good flexibility, and zero backlash. Created for high performance motion control systems, the X-Series incorporatestwo flexible element sets—combining greater end-to-end rotational accuracy with radial flexibility—in one design.
Features
• Ideal for motion control applications(servo motors).
• Up to 10 times greater torsional stiffness than beam types.
• Low cost alternative to bellows types.• No moving parts. • No maintenance. • No backlash.• No lubrication.• Excellent quality.
H E L I C A L Idea Stimulators, X-Series
HELICAL X-Series, Aluminium, Technical Data
BBoorree DDiiaammeetteerr
((++..0055 // -- ..0000 mmmm))PPeerrffoorrmmaannccee DDaattaa
BBaassiiccMMooddeell
NNuummbbeerr
DDiimmeennssiioonnaallIInnffoorrmmaattiioonn
WWeeiigghhtt
Min(mm)
3.00
4.00
6.00
9.00
10.00
12.00
Size(mm)
M2.50 -.45
M3 -.5
M3 -.5
M4 -.7
M5 -.8
M6 -1.0
XCA15
XCA20
XCA25
XCA30
XCA40
XCA50
TorsionalRate
(Deg/Nm)
1.13
0.46
0.22
0.13
.066
.029
AAttttaacchhmmeennttMMeettrriicc CCaapp
SSccrreewwss
Max(mm)
6.00
8.00
10.00
12.70
17.00
22.23
TorqueRating(Nm)
0.30
0.50
1.00
2.00
5.00
10.00
ParallelOffset(mm)
0.10
0.10
0.15
0.15
0.20
0.20
OD(mm)
15*
20**
25
30
40
50
L(mm)
24
28
30
38
60
65
X 10-4
(kgcmsec2)
0.028
0.11
0.30
0.78
3.9
10.5
SeatingTorque(Nm)
1.1
2.0
2.0
4.7
9.5
16
IInneerrttiiaa†
Weight(grams)
9.2
20
33
60
177
306
Example
1 Basic Model Number(X = cross-slotted coupling, C = integral clamp, A = aluminum,
S=303 stainless steel)
XCA25 - 10mm - 8
Metric bores are specified as millimeter size (-10mm).Inch bores are expressed as number of 32nds (-8 = 8/32 = 1/4” = .250”).
Outside Diameter Designator
Major Bore Designator
Minor Bore Designator
Major and minor diameter shafts may enter flexing area during operation.
How To Order
1
A New Angle on Universal Joints
H E L I C A L Idea Stimulators, Universal Joints
characteristics, torque capacity, angular and parallelmisalignment capabilities, torsional and lateral bendingrates of flexured u-joints can be made to suit specific specifications and/or requirements.
By using a flexured u-joint, the customer benefits from:
Choice of materials Infinite choice of end attachments Optimized misalignment and torque capacities A variety of torsional and lateral bending rates Ability to run in either manual or motor-driven applicationsConstant velocity
An added bonus—flexured u-joints do not have:
Backlash Moving parts Maintenance and lubrication requirements Limited selection of capabilities and sizes Limited angular misalignment capability
Once the designer/customer provides Helical with the performance requirements for his/her device, machine,or equipment, a specific flexure design that will meet orexceed application requirements is developed. Anattachment may also be specified to securely interfacewith adjacent components. The result is a Helical flexured u-joint that works as an integral part of the customer’s application.
Helical flexured u-joints are tailor-made for customerapplications, using customers’ specific requirements as a starting point. The finished product is a Helical flexured u-joint that “fits like a glove” in the device,machine, or equipment.
Helical Products Company, with its unique HELI-CALFlexure, covers most u-joint requirements. Whether theapplication requires just a small angle of slightly morethan 5° , or one calling for a 90° bend, Helical has a “flexure” answer. This “answer” employs the infinitely variable HELI-CAL Flexure, with its amazing range of variable characteristics. No longer is it necessary to use a “one size fits all” approach to u-joints.
HELI-CAL Flexured U-joints ProvidePrecision Operating Characteristics
A universal joint is a mechanical connection between rotating shafts which are generally not in parallel, butintersecting. “U-joints” transmit torque and motion.
U-joints are used in a variety of applications, whereverhandling significant angular misalignment is the mainfocus. Typical applications include: articulating mecha-nisms, food processing equipment, replacement forexpensive gearboxes, and drives where motor positionmust be moved angularly off centerline of the driven unit.
The oldest and most common type of u-joint is calledthe Cardan or Hooke type joint. It consists of hubyokes, connected by a cross shaped intermediatemember. These popular u-joints are frequently used inautomotive applications. Because the design incorpo-rates several different piece parts, the moving parts ofthis type of u-joint usually require lubrication; and asthe joint wears, the amount of backlash or free playwithin the joint itself grows. Even a lubricated Cardan
u-joint will require periodic mainte-nance, and may leak lubricant.
Performance wise, Cardan u-joints cantransmit relatively high torque with mini-mal radial loads. But, by design these u-joints have difficulty compensating forparallel offset and axial misalignment.Cardan types also introduce rotationalinconsistencies into drive systems, aphenomenon known as “non-constantvelocity rotation.”
The HELI-CAL Flexure is an advancedand unique u-joint solution that general-ly exceeds the capabilities of commonu-joint designs. A Helical u-joint is reallya flexure capable of over 5° of angularmisalignment. It may accommodate upto 90° of angular misalignment in certain circumstances. This type of u-joint will also compensate for axialand parallel misalignment.
A frequent application of the Helical flexured u-joint isthe direct replacement for a 90° bevel gearbox.Gearboxes are expensive, and usually need lubricationfor their meshing gear surfaces and bearings.Replacement with a maintenance free Helical flexuredu-joint can save money, both on initial purchase priceand on maintenance costs. Flexured u-joints can bebeneficial most anywhere—for example: aerospace,appliances, electronics, control mechanisms anddrives, medical and optical devices, sewing machines,instrumentation, and textile machinery.
The performance capability of each HELI-CAL Flexure isdetermined by characteristics such as: flexure outsidediameter, inside diameter, coil thickness, material, num-ber of coils, and number of starts. By altering these
Helical flexured u-joints can be made to suit specificspecifications and/or requirements. Note coil widths.
Cardan u-joint
HELI-CAL Flexure
422H
How To Make The Right Connections
For many years Helical Products Company has beenrecognized as the pioneer in the design and manufac-ture of helical beam type couplings, universal joints(UJs) and machined springs. The unique capabilitiesof the HELI-CAL Flexure have solved countless designprojects for engineers in many diverse industries.
But curiously, engineers or designers often fail to recognize how important the integration of the flexure/attachment is in improving component performance.Typically, the portion of a coupling that fastens,clamps, meshes or otherwise contacts adjacent components is referred to as an “attachment.” It isthese various attachments and their potential impacton system design, we will discuss here.
First, let’s consider some of the special characteristicsinherent to a HELI-CAL Flexure. Flexured couplingsand UJs are backlash free and provide constant veloc-ity rotation regardless of misalignment. Any means ofattachment used in conjunction with this type of prod-uct should maintain these properties, and comple-ment them. The most common form of couplingattachment, set screws, can introduce backlash into asystem unintentionally. Having said this, it should benoted that Helical does sell many flexures with setscrew attachments. [The key to assuring this attachment method does not compromise effectiveness of the entire system isknowing the configuration of the adjacent compo-nents, D-shafts for example, and the anticipated dutycycle the component will encounter.]
Clamp style attachments are frequently used as a zerobacklash, positive means of transmitting rotationalmotion between components. When compared to setscrews on a performance basis, clamps squeezearound the shaft circumference rather than creating adimple in the shaft. Clamp attachments better lendthemselves to applications where the components areassembled and disassembled occasionally. Clampsrequire more linear space for the coupling, are inherently less dynamically balanced and slightlymore expensive to manufacture. At times neither of
these attachment methods may be optimal for yourapplication. This raises the question,
“What other alternatives do I have?”
The variety of attachments available is limited only bythe imagination of the design engineer, and the lawsof physics. The configuration of coupling attachmentscan be as simple as the plain bore or as complex as apinion gear. The purpose in seeking a customizedattachment is to minimize the cost, optimize performance, simplify design, reduce system size, or reduce weight.
By using the HELI-CAL Flexure along with an attach-ment, the engineers are allowed to dream in their system design. Most designers view a special ormodified standard with a cost being too great. Inactuality, customized attachments more than pay forthemselves. The proper attachment will minimizeassembly-production time and reduce the total number of parts to purchase, to maintain in inventory,and to assemble. All of this produces an overall production savings.
Pictured are some examples of customized attachments and the benefits they have provided.
The right attachment will reduce assembly/production costs.
A custom blind attach-ment designed to trans-mit torque in a singledirection.
Integrating a lever arm into aclamp attachment flexureallowed linear motion to beconverted to rotary motion.
Detachable caps permit flex-ure installation where com-ponents cannot be spreadapart to slide the flexure ontocomponent shafts.
A threaded shaft attachmentoffers several advantages.Fine axial length adjustmentsand blind assembly are justtwo potential uses.
H E L I C A L Phone 805-928-3851 / Fax 805-928-2369 / www.Heli-Cal.com 23
Flexure Attachments That Make Sense
H E L I C A L Idea Stimulators, Flexure Attachments
H
A: Multiple start flexures are beneficial because theynot only provide redundant elastic elements should afailure occur, but a failed element (coil) will be physically trapped by the remaining one(s).
Another multi-start benefit applies to compressionand tension springs. When compressed (or extend-ed), single start springs provide a reaction force plusa moment. This moment is created because the line ofaction is through the longitudinal centerline of thespring, and the spring force is action at the coil meancenterline. The distance between these centerlinesprovides the moment arm of the subject moment. On multiple start flexures, all internal moments areresolved within the spring. The big benefit is thatthese multiple start springs then compress (orextend) in a very straight manner. There is no ten-dency for the spring to squirm when deflected, and norestraint is necessary to resolve the free moment.
Sometimes there is a desire to have multiple elasticrates in a given spring. For instance, a compressiontorsion and lateral bending rate may be specified.With most types of springs accomplishing one ofthese rates can be a challenge, but three is impossi-ble. Not so with a multiple start Helical machinedspring. A machined spring designer can choose coilsize, number of coils and multiple start coil featuresto achieve specified, different, elastic rates.
Q: I understand that machinedsprings can be designed so thatthe coils don’t touch. Does thismean that no sound would be gen-erated by the spring?A: Exactly. In those applicationswhere resonance is desired for highefficiencies, the best choice is amachined spring of a multiple startconfiguration. In fact, machinedsprings may be the only choiceunder these circumstances. Thelinear rate and non-contact featureof the machined spring provide out-standing performance. The multi-ple start aspect prevents lateralbending and lateral translationsfrom compromising in-line motions.
By Gary L. BoehmSenior Research EngineerHelical Products Company, Inc.
Gary Boehm has spent over 30 years in machinedspring R&D. Following are questions frequently askedof Gary regarding machined springs, and his answers.
Q: What is a machined spring?A: A Helical machined spring is a single piece ofmaterial machined into a spring configuration. Key tothe versatility of the machined spring is the HELI-CALFlexure, a flexible helix beam concept utilized in themanufacture of Helical machined springs. BecauseHelical springs are “machined” to specific designrequirements, they provide more precise perfor-mance, features and functions than can other moretraditional types of springs.
Q: What are some of the advantages of machinedsprings over conventional springs?A: With machined springs, desired features or func-tions can be made part of the spring, such as: specialattachments, precise spring rates, multiple integralcoils, and other special characteristics. These aspectsare generally not possible with traditional springs.
Machined springs also support multiple design objec-tives such as reliability, repeatability, and integrationof multiple parts, which results in a reduction ofassembly complexity.
Q: How are machined springs different?A: The ends of machined springs can be made verysquare, a beneficial feature for compression springs.Attachments for torsional springs can be integratedso that no forces act upon the spring, just themoment enabling torsional deflections. Extension(tension) springs can include robust attachments thatare resistant to breakage. Machined springs can pro-vide very precise, linear deflection rates because virtu-ally all residual stresses are eliminated. As a result,there are no internal stresses toovercome before deflection occurs.
Q: Explain the terms “singlestart” and “multiple starts.”A: A Single start spring is a singlecontinuous coil element whichstarts at one end and terminates atthe other end. This configuration iscommon to most springs. A “double start” spring has twointertwined continuous coil ele-ments. In effect, this puts two inde-pendent helixes in the same cylin-drical plane. Multiple start flexures,such as triple start etc., are similarextensions of the concept.
Q: What are some of the benefitsof multiple start flexures?
End of coil End of coil
Start of coilStart of coil
Single start spring
Coil from #1 Start Start of coil #2
Start of coil #1Coil from #2 Start
Start of coil #1�(near side)
Start of coil #2,�far side, 180° from�start of 1st coil
Double start spring
More versatile
What is a Machined Spring?
H E L I C A L Idea Stimulators, Machined Springs
424 H
1. DRIVE *
a or b. DIRECTION
c. CONTINUOUS d. REVERSING
e. STOP-START __________________________________________ cycles/sec
f. RPM ______________________g. MANUAL _________________________
2. SERVICE *
a. OPERATING TORQUE _________________________________ lbin or Nm.
b. MAXIMUM TORQUE __________________________________ lbin or Nm.
3. MISALIGNMENTS *
a. ANGULAR ______________________ deg
b. PARALLEL __________________ in. or mm
c. AXIAL Compression/Extension __________________ in. or mm
d. SKEW – please provide sketch
Proposal Form for Couplings and U-Joints (Please refer to the literature request form for machined spring proposal forms.)
Name ________________________________________________________ Telephone ________________________________ E-Mail __________________________________
Company ______________________________________________________________________________________________ Fax ____________________________________
Address _______________________________________________________________________________________________________________________________________Street / P.O. Box City State Zip
4. TORSIONAL RATE *
______________________________________________ deg/lb. in. or deg/Nm
a. less than ___________ b. equal to ___________ c. greater than _________
5. INERTIAL LIMITATION / MASS MOMENT OF INERTIA
____________________________________________ lb. in. sec2 or Kg cm sec2
a. less than ___________ b. equal to ___________ c. greater than _________
6. WEIGHT
_______________________________________________________oz. or gm.
a. less than ___________ b. equal to ___________ c. greater than _________
7. ENVIRONMENT
a. TEMPERATURE _________________________________________ °F or °C
b. CORROSIVE ___________________________________________________
c. ABRASIVE ______________________________________________________________________
OPERATING INFORMATION
FLEXURE AND COMPONENT LAYOUT
Type of Equipment ________________________________________________________________________________________________________________________________ ______________________
Comments ____________________________________________________________________________________________________________________________________________________
_______________________________________________________________________________________________________________________________________________________________
8.a.* PREFERRED OUTSIDE DIAMETER ______ in. or mm
MAXIMUM OUTSIDE DIAMETER _______ in. or mm
c.* DRIVER DESCRIPTION
__________________________________
__________________________________
__________________________________
e.* SHAFT DIAMETER
_______ in. or mm
b.* PREFERRED LENGTH _____ in. or mm
MAXIMUM LENGTH ______ in. or mm
d.* DRIVEN DESCRIPTION
__________________________________
__________________________________
__________________________________
f.* SHAFT DIAMETER
_______ in. or mmg.* SHAFT TO SHAFT
_______ in. or mm
ATTACHMENTS
INTEGRAL CLAMP
2 SET SCREWS AT 120°
2 SET SCREWS AT 90°
1 SET SCREW
ROLL PIN _____ in. or mm
DOWEL PIN ____ in. or mm
KEYWAY
_______type_______
_______size_______
OTHER/ DESCRIBE BELOW
10. DRIVER*
a
b
c
d
e
f
g
h
11. DRIVEN*
a
b
c
d
e
f
g
h
9. BORE TOLERANCE
a. COMMERCIAL
+.002 in. -.000 in.
or+.05 mm -.00 mm
b. PRECISION
+.0005 in. -.0000 in.
or+.015 mm -.000 mm
12. MATERIAL
___ 7075-T6 ALUMINUM ALLOY
___ 17-4 PH STAINLESS STEEL
___ OTHER ________________
13. PRODUCTION QUANTITY
___ 1-24
___ 25-100
___ 100+
▼▼
DRIVER DRIVEN• •
▼
▲
a
b
H E L I C A L Phone 805-928-3851 / Fax 805-928-2369 / www.Heli-Cal.com 25
H E L I C A L Plus, Engineering Proposal Form
*Items markedwith an asteriskare essential foroptimum design.
If interested in receiving any of the above literature, please fill out the information needed, check the appropriate boxes,note the quantities needed and fax to 805-928-2369. If you have any questions please call 805-928-3851. You may also visit our website at http://www.Heli-Cal.com.
Quantity ____
COUPLING PAMPHLET
12 page pamphlet outlines thesteps to choosing or designing thecorrect Helical coupling.
Name __________________________________________________ Telephone _____________________ E-Mail ______________________________
Company ______________________________________________________________________________ Fax ________________________________
Address ____________________________________________________________________________________________________________________Street / P.O. Box City State Zip
• Ideal for motion control applications (servo motors)
• Up to10 times greater
torsional stiffness than beam types
• Low cost alternative to
bellows types • No moving parts, no maintenance • No backlash • No lubrication • Excellent quality
901 W. McCoy Lane • P.O. Box 1069 • Santa Maria, CA 93456-1069 Phone (805) 928-3851 • FAX (805) 928-2369 • www.Heli-Cal.com
Visit our website or call for more info!
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PRODUCTS COMPANY, INC.
ENTER THE WORLD OF MACHINED SPRINGS
The springfor the
21st century
AboutEngineers,Couplings
andConnections
It won’t be long beforeyou can visit …
AboutHelical’s
EXTRAORDINARY
“Machined”Springs
~and the remarkableHELI-CAL® Flexure
for your special applications
~for those who are as yet unfamiliarwith this versatile product
ToDesign
EngineersCoupling or Springdesign problems?
Here’s an idea.
Your greatest design resource may be...
...The HELI-CAL® Flexure'makes systems work better'
Quantity ____
X-SERIES BULLETIN
Introduces the new,torsionally stiff X-Seriescoupling, a low cost alternative to bellowstypes.
Quantity ____
SPRING PAMPHLET
Information about Helical’sExtraordinary “Machined” Springsand the remarkable HELI-CAL®
Flexure for your special applications.
Quantity ____
DESIGN ENGINEER PAMPHLET
Discusses that your greatest designresource might be the HELI-CAL®
Flexure. It make systems work better.
H E L I C A L Plus, Literature Request Form
426 H E L I C A L Phone 805-928-3851 / Fax 805-928-2369 / www.Heli-Cal.com
Quantity ____
ENGINEERING PROPOSAL FORM FORCOMPRESSION SPRINGS
Quantity ____
PF SERIES BULLETIN
Presents the many advantages of this innovative power transmission couplingthat utilizes the provenHELI-CAL® Flexure.
Quantity ____
ENGINEERING PROPOSAL FORM FORTORSION SPRINGS
Quantity ____
MACHINED SPRINGSBROCHURE
Illustrates pictorially a fewof the many applicationspossible with Helical“machined” springs.
Helical Products Company,Inc. has a unique product inthe HELI-CAL Flexure concept.Equally unique and importantis the high level of service we
at Helical provide to our customers. Togetherthis is our competitive advantage.
When speaking of service we talk of all areasneeded to supply the HELI-CAL Flexure to thecustomer. Putting it in perspective, we like torelate our philosophy to the spokes of a wheel.Each of the spokes represents a unit of ourorganization - drafting, engineering, finance,administration, shipping, sales, production,manufacturing and marketing. Each in its turn bears the weight of responsibility - andopportunity - to provide and maintain this highlevel of service to the CUSTOMER - the hub ofour wheel.
Note: Helical Products Company, Inc., believes the information in this publication is accurate as of its publication date; suchinformation is subject to change without notice.
Helical is not responsible for any inadvertent errors.
The following are trademarks of Helical Products Company, Inc.: HELI-CAL and HELI-CAL Flexure.
Passing this commitment on to the next“spoke” requires good, clear communicationand cooperation between departments, withthe full realization that our focus is always onthe customer and their needs. Each department,and, of course, each individual is important atHelical. Helical has never considered itself tobe an “I” company, but a “WE” company.With this philosophy we are able to supply anexcellent product as well as provide outstand-ing service at a fair price.
Our commitment has been to build an organization through hard work, fairness,cooperation and mutual trust for each other’sroles; to act with courtesy, dependability, reliability, and honesty toward the customer.
Helical does what it says - with pride in its product, its service, and its people.
H E L I C A L Phone 805-928-3851 / Fax 805-928-2369 / www.Heli-Cal.com 27
H E L I C A L Plus, Helical’s Philosophy
H
The Team
PRODUCTS COMPANY, INC.
SINCE
1958
Helical Products Company, Inc.
WORLD-WIDE PRODUCT SALES OFFICES
SINCE
1958
901 W. McCoy Lane, P.O. Box 1069, Santa Maria, CA 93456Toll Free 877-353-9873, fax 805-928-2369 www.Heli-Cal.com
©Copyright 2008, Helical Products Company, Inc. 080105cat/HJEKTBDD
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“Man’s mind, once stretched by a new idea, never regains its
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- Oliver Wendell Holmes
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